It is usually possible to look into someone's VOMS server and see
who are considered members using a web browser with a certificate.
VOMS servers are web-services protected by GSI security. Hence a grid
certificate is needed to authenticate with the web-service. Unless you
know otherwise this condition rules out wget and curl. Once
authenticated the rules are pretty loose on who can view the members of
the VO. Under OSG, any certificate issued by DOEGrids can view the
contents of the VO. I can't speak to LCG/Nordugrid but I know one can
inspect the ATLAS VO server.
Here are the general rules that I use: Feel free to test these against
DOSAR's VOMS
1) Get the URL of the voms server:
You can derive these from the entries in edg-mkgridmap.conf file
distributed with OSG. Simply change "vomss://" to "https://" and
remember that the entry contains the mapping to the local account (last
word). e.g:
group vomss://voms.fnal.gov:8443/voms/des?/des/production des
The URL is:
https://voms.fnal.gov:8443/voms/des?/des/production
2) Put the URL into a browser containing your certificate
You should probably arrive at the top web-page for the VO. This has
worked for the handful of tests against OSG VOMS servers I just tried
3) On the left menu bar, there should be an entry for "Administer the
VO" or "Adminstrate VOMS". Click on this. The difference in the link
is dependent on which version of VomsAdmin is running on the server.
4) On the resulting page you should see either a "Users" or "List Users"
on the left menu bar. Clicking this should provide the list of all
members regardless of roles or groups.
5) You can use the menu items under the administration page to see group
and role information as well.
Thanks to Patrick McGuigan for this info.